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Finding the Fourth Proportional to 129,940.88, 194,989.07 and 56,068.88

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Solution

The fourth proportional to 129,940.88, 194,989.07 and 56,068.88 is: 84,136.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,940.88 : 194,989.07 = 56,068.88 : x
  2. Step 2: Convert to fraction form
    129,940.88/194,989.07 = 56,068.88/x
  3. Step 3: Cross multiply
    129,940.88x = 194,989.07 × 56,068.88
  4. Step 4: Simplify right side
    129,940.88x = 10,932,817,932.37
  5. Step 5: Solve for x
    x = 10,932,817,932.37/129,940.88
  6. Step 6: Final answer
    x = 84,136.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.